GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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If you were burning a candle, which of the following would be a reversible change?
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The solid candle wax melts
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The liquid wax in the wick burns
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The flame produces smoke
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All of the above
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Explanation:
Detailed explanation-1: -Therefore, the melting of wax is a reversible change.
Detailed explanation-2: -Melting of Wax Is a Physical Change but Burning of Wax Is a Chemical Change: Melting of wax, by itself, involves a change of state from solid to liquid. Here in the given process, only the physical state of a substance changes, but no new products get formed.
Detailed explanation-3: -When we burn a piece of paper it turns into ash. We cannot get the paper back from the ash. Hence, it is an irreversible change.
Detailed explanation-4: -The burning of a candle is a chemical change whereas the melting of a candle is a physical change. Why?
There is 1 question to complete.